Frame-Mapped GFP Controller
Features
The Nuvation GFP-F megafunction includes the following features:
- Fully compliant with Frame-Mapped General Framing Procedure (GFP‑F) specification from I‑TUT
- Encapsulator receives frames from multiple channels and individually maps frames into single GFP frames
- Decapsulator receives frame-mapped GFP frames, and removes various GFP-unique fields
- GFP and Ethernet configuration and status signals are available, and mappable to any micro-controller interface
- Parameter and status signals may be connected to a CPU interface such as an 8051 or I2C interface
- Extension header supports a linear (point-to-point) connection. Other topologies supported with modifications.
- GFP control frames are supported at a maximum of 10 percent of full line-rate
- Minimum packet-size is 32 bytes
- Control frames always have higher priority than user data frames and packets
- AtlanticTM-compliant interface: datapath interfaces to the 64-bit Atlantic specification at 50 MHz
Block Diagram
Figure 1 shows a block diagram of the Nuvation GFP-F megafunction.
Figure 1. Nuvation GFP-F Core Block Diagram
 View full detail (336KB) (PDF)
Description
Nuvation's GFP-F IP Core receives and maps entire client signal frames into one GFP frame adhering to the format set out for the frame-mapped GFP mode of client signal adaptation. The GFP-F Core encapsulates entire octet-aligned, variable-length client signal frames into one GFP frame. The core is optimized for the Altera® Stratix®, Stratix II, and Cyclone® II devices.
Device Utilization & Performance
Table 1 lists typical utilization numbers for the GFP-F megafunction.
| Table 1. GFP-F Megafunction Utilization Numbers |
| Target Device |
Speed Grade |
Utilization Logic
Elements (LEs) (1) |
Performance
(fMAX) |
Parameter Setting |
| Stratix FPGA |
-5 |
5862 |
61.42 MHz |
Contact Nuvation |
| Stratix II FPGA |
-3 |
6082 |
92.99 MHz |
Contact Nuvation |
| Cyclone II FPGA |
-6 |
5525 |
61.61 MHz |
Contact Nuvation |
Note:
- Quartus® II software reports the number of adaptive look-up tables (ALUTs) that the design uses in Stratix II devices. The LE count is based on this number of ALUTs.
Deliverables
- Netlist or source code license
- User guide and technical support included with license
Contact Information
For additional information, contact:
Nuvation
3590 North First Street
San Jose, CA 95134
Tel: (408) 228-5580
Fax: (408) 228-5590
Email: ipcores@nuvation.com
URL: www.nuvation.com
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